1. Department of Psychiatry, School of Medicine, Kyungpook National University, Daegu, Korea.
2. Department of Psychiatry, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
3. Department of Psychiatry, Gachon Medical School, Gachon University of Medicine and Science, Incheon, Korea.
4. Department of Neuropsychiatry, Seoul Metropolitan Boramae Medical Center, Seoul, Korea.